Fountain-pen.



M.. R. GRSSMAN.

FOUNTMN PEN. APPLIGMXON FILED MAY is, 1909,

yi., Emma Mar. 4, 1913.

MBTIN-B. CRUSSMAN, 0F. BOSTON, MASSACHUSETTS.

FOUNTAIN-rmt'.

intacte.

Specificatien of Letters Patent.

Patented Mar. 451-913.

Application led may 13, 1909. Serial No. 495,672.

To all wkom'zty-majcfcono-em: v Y

Be it known that I, MARTIN R. CRossMAN, a citizen of the United States, residing at Boston, county of Suffolk, and lState of Massachusetts, have invented an Improvement in Fountain-Pens, of which the'fol lowing description, in connection with the accompanying drawing, is a specication,l like letters on the drawlng representing like parts.

'Ihis invention relatesv to fountain pensE and has for one of its objects to provide a novel fountain pen which can be made nonleakable so that it may be safely carried either end up without danger of leaking,V

and for another object to provide a novel construction which will prevent the pen from ooding when the ink is nearly exhausted therefrom.

I accomplish the first object of my invention by providing the pen with a valve which is situated adjacent the inner end of the feed and is adapted when properly placed to close communication between the inner reservoir and the feed duct, and which may be operated from the exterior of the pen; and I accomplish the second object of my invention by providinga feed bar of novel construction which acts in conjunction with the valve to restrainthe feeding of the last few drops of ink and to prevent said drops of ink from flowing from the pen fast enough to cause a blot.

Figure 1 is a longitudinal section through a pen embodying my invention; Fig. 2 is a longitudinal section taken at right angles to Fig. 1; Fig.' 3 is a section on the line m-w, Fig. 2; Fig. 4 is a section on the line 'gf-y, Fig. 2.

3 designates the barrel of the pen which contains the usual ink Vreservoir 4, and 5 designates the nozzle orremovable section which is shown as connected to the barrel 3 with an ordinary screw joint 6 and which receives the feed 7 and the pen oint 8. These are 4the parts which are usual y found in fountain pens and, with the exception lof the feed, they may be of any suitable or usual construct-ion.

The feed is provided with the usualink duct 9 which conducts the ink from the ink reservoir 4.- to lthe pen point. In my improved pen I form the feed 7 with the auxiliary chamber 10 which extends clear through the feed from the to to the bottom thereof. This chamber is pre erably larger in its central-portion than at its ends, althou h the exact contour is not essential. The eed 7 1s flattened `or cutaway 'at 11-on both its upper ,and itsV lower side, and each flattened portion extends substantially the length of the slot 10 and terminates at each end in walls-or shoulders 12. The inner end of the feed 7 which has a slot therein fits the interior of the removable section 5, and, therefore, the portions 11 where the feed is cut away form with the interior of the removable section chambers which communicate with the slot l0, these chambers and-the slot 10 forming an auxiliary ink reservoir capable of containing several drops of ink. This auxiliary ink reservoir communicates with t-he ink duct 9.

The feed 7 does not extend clear through the removable section, but instead the inner end' of the feed is situated a shortfdistance in from the inner end of .said removable sec:

tion. Extending longitudinally through the feed and slidably mounted therein is a valve stem 13 carrying at its inner end a valve 121 which is adapted to close the inner endvof the removable section 5 when the stem is withdrawn, as shown in Fig. 2, thereby ting off communication between the ink reservoiry 4 and the feed duct 9.V By forcing the stem 13 inwardly, the valve is carried away from the inner end of the removable section 5, thus opening communication between the ink reservoir and the feed duct. This is the position of the parts when the pen is in use. When the pen is not in use, the valve 14 may be seated against the inner end of the removable sect-ion by drawing the valve stem 4outwardly and the pen may then be carried either end up without any danger that it will leak.

I prefer to make 'the valve stem with the head or knob l5 at its end in order to facilitate the operation of the valve. 'The valve 14 may be of any suitable construction but I have herein shown it as comprising a ring of cork 16 which is confined on the valve stem 13 between two hard rubber washers or disks 17. The cork being elastic will make a tight joint with the end of the removable section. The knob 15 is situated beneath the exposed lend of the feed and the valve may, therefore, be operated by a persons thumb or `finger without danger of soiling his hands. i

Since the feed is formed with au auxiliary ink chamber l0 situated between the valve and the pen point, it will be observed that the feed duct always has commumcatlon with this reservoir and therefore if a erson only wishes to use the pen for a s ort time, such as would be consumed in writing his name, orwriting a check, it is unnecessar to open the valve 14, for there will be a su cient suppl of ink in the auxiliary reservoir to last or a short time. I nd that the presence of this auxiliary reservoir prevents' the 4pen from flooding for it consti` tutes a small chamber for receiving the last Y few drops of ink, which are those that produce the objectionable flooding or blottlng, and owing to the comparatively small size of this 'auxiliary chamber, these last few drops will be held therein by capillary attraction and will not, therefore, be fed from the penfaster than the ink is used. I find alsoy that the shape as well as the vlocation of the auxiliary chamber assists materially in preventing flooding, for theauxiliary reservoir herein shown presents a large wallarea relative to its size, and this increases the capillary attraction above referred, to. The valve device herein shown can also be`used to' regulate the flow of ink to the pen. A ne pen uses less ink than a coarse or a stub pen does, and byv roviding the valve herein shown it is possi le to use the same feed with either acoarse or fine pen by simply adjusting the valve closer` to or farther from the end of the removable section. If a fine pen is being used the valve may be adjusted so, that it will be nearly voir and 'a feed bar provided with a feed.

en, the combination `duct and a slot extendin from one side to the other thereof an communicating with the feed. duct and const1tut1ng an aux-` iliary ink reservoir, of a valve stem extend ing through the feed, and a valve at the end thereof adapted'to close communication between the main reservoir and the feedv duct while leaving the 'auxiliar-y ink reservoir in communication with said feed duct.

2. In Ia fountain en, the combination with a barrel contaimng a main ink reservoir, of a removablefeed-sustaining section secured to the barrel', a feed bar in said removable section, said feed bar being provided with a feed duct and also being chambered intermediate of its ends to provide an auxiliary ink reservoir which communicates with said duct, a valve stem extending longitudinally through the feed bar and slidably mounted therein, a valve at the inner end of the valve stem which is adapted to seat against the inner endof the removablesectipn thereby-to close communication between said auxiliary ink reservoir and the main ink reservoir.

3. In a fountain pen, the combination with a barrel constituting a main ink reservoir, of a feed dprovided with a feed duct and also rovi ed with a slot extending transverse y therethrough from one side to the other which slot communicates with the feed duct, said feed being iiattened or cut away atl each side,'as at 11, whereby an auxiliary reservoir is formed having ,a large Y wall area relative to its capacity, a valve stem-extendin throu hthe .feed f1'om""`one end to the ot er an movable relative to the feed, and a valve on said stem adapted to close communication between the feed and the main ink reservoir.

v In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

MARTIN R. CROSSMAN.

Witnesses: l

Lome C. Sm'rn,

THOMAS J. DRUMMOND. 

